1904.] NATURAL SCIENCES OF PHILADELPHIA. 35 



with the beads on the spirals. The round, oblique aperture is closely 

 lirate within. The columella is noticeably concave, and bears a weak 

 tooth below. The narrow umbilicus is bounded by a white cord. 



Alt. 7.5, diam. 6.5 mm. 



Hachijo-jima, Izu. Types No. 85,979, A. N. S. P., from No. 1,395 of 

 Mr. Hirase's collection. 



This species, in form and sculpture, is much like E. atratus (Gm.) on 

 a diminutive scale, but the columellar tooth is far weaker. E. ruber 

 A. Ad., E. gemmatus (Gld). and other small granose species also have 

 a much stronger columellar tooth. 



Euchelus hachijoensis n. sp. PI. VI, fig. 56. 



Shell globose, with short spire and narrow umbilicus; spirally 

 granose-lirate ; coral-red, sparsely dotted with darker red, usually on 

 alternate spirals above and on all the basal spirals. Whorls 4, convex, 

 the first 1 smooth. 



Sculpture of crowded, closely granose or beaded spirals, 12 or 13 

 in number and subequal on the last whorl, the granules weakly 

 connected across the intervals. On the penultimate whorl the spirals 

 usually alternate in size, as is ordinarily the case in shells where they 

 increase in number by intercalation. The subcircular, oblique aper- 

 ture is smooth or at least not distinctly sulcate inside. The columella 

 is slightly concave and terminates in a very weak tubercle. The 

 umbilicus is bounded by a white rib. 



Alt. 4, diam. 4.5 mm. 



Hachijojima, Izu. Types No. 85,978, A. N. S. P., from No. 1,3956 

 of Mr. Hirase's collection. 



This small red species has an unusually weak columellar tubercle. 

 I do not know of any closely related form. 



Euchelus (Hybochelus) cancellatus orientalis n. subsp. PL VI, figs. 57, 57a. 



Shell similar to E. cancellatus of South Africa in form, but differing 

 in having more large spiral cords, 10 at the beginning of the last whorl, 

 each interval bisected by a small thread. Near the end of the whorl 

 some of these threads become nearly as large as the primary cords, and 

 minute threads of a third order appear in some of the intervals. In 

 E. cancellatus there are only 8 primary cords at the beginning of the 

 last whorl, the intervening threads are much larger, and additional 

 threads are intercalated sooner and more numerously. The pits 

 produced by oblique riblets are much narrower in orientalis, the upper 

 series in each pair of intervals are usually subdivided, while in E. 

 cancellatus the pits are regular and uniform. 



Alt. 13, diam. 15 mm. 



